Re: CrossStaff makes quavers lose flag if not beamed

[Jean Abou Samra]

Le 14/09/2021 à 11:48, Paul Hodges a écrit :
> Exactly as the title says - crossStaff works for all stemmed notes, but
> quavers which are not beamed lose their flag.  I have resorted to
> merging in an extra note to get the flag, as in this example which shows
> the problem and my hack:
>
> \version "2.23.3"
> \score {
>     \new PianoStaff <<
>       \new Staff { \clef treble
>                    \crossStaff {<e' c''>4 q8 r q q r q |
>                                 << q \new Voice { \voiceOne c''8 } >>}
>       }
>       \new Staff { \clef bass \stemUp
>                    \crossStaff {<c g>4 q8 r \autoBeamOff q q r q |
>                                 q}
>       }
>     >>
>     \layout {
>       \context {
>         \PianoStaff
>           \consists #Span_stem_engraver
>       }
>     }
> }
>
> This problem does not seem to be affected by any other settings -
> especially (as shown in my example) not autoBeam[On]Off.  The problem is
> also present in the older versions of LilyPond at LilyBin.
>
> Regards,
> Paul


Hi Paul,

This is expected. \crossStaff is meant to be used
only in the voices that should have their stems
made to extend past their own staff. Remove
\crossStaff from the upper staff and everything
is correct.

\version "2.23.3"

\new PianoStaff \with {
  \consists "Span_stem_engraver"
} <<
  \new Staff {
    \clef treble
    <e' c''>4 q8 r q q r q | q
  }
  \new Staff {
    \clef bass
    \crossStaff {
      \stemUp
      \autoBeamOff
      <c g>4 q8 r q q r q | q
    }
  }
>>


Best,
Jean